Leonar3do : eye distance and separation

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@29550 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Ticket #3739: workaround for NPE

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@29551 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
web: CAS - default color is selected at first, when the user click on "Use as text" button. (#3530)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@29552 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e